Dysentery amoeba or histolytic amoeba is the causative agent of intestinal amoebiasis in humans. The causative agent is a protozoa, which belongs to the Protozoa type. The life cycle of the protozoan consists of two phases that replace each other, these are the vegetative and cyst phases.
Vegetative forms of the amoeba are represented by tissue, large and small vegetative, as well as precystal forms. They replace each other during the life cycle of the causative agent of amoebiasis and may indicate an acute or chronic course of the disease, as well as the carriage of dysentery amoeba.
Thus, the tissue form of the amoeba is found exclusively in the acute course of amoebiasis, it can be found in internal organs, but the pathogen is rarely detected in faeces. The large vegetative form, on the contrary, is most often detected in acute intestinal amoebiasis in faeces. Dysentery amoeba in a large vegetative form feeds on human erythrocytes, which can be detected in the cytoplasm of the amoeba during smear examination, and therefore the large vegetative form of the causative agent of amoebiasis has received a second name – erythrophage.
The luminal form of dysentery amoeba lives in the intestinal lumen. It can be detected in faeces and indicates the presence of a chronic disease, the carrier of the causative agent of amoebiasis, or it can be a manifestation of the onset of a period of convalescence after a previous acute amoebiasis.
The precystic form is found in the intestines exclusively in patients with chronic amoebiasis or carriers (after taking laxatives).
Vegetative forms are unstable in the external environment and die quickly, but dysentery amoeba cysts can persist outside the body for a long time. It is worth saying that it is the cysts that can cause the development of amoebiasis when they enter the human body in an alimentary way.
Epidemiology of dysentery amoeba
Amoebiasis affects only humans. Patients with chronic amoebiasis, as well as convalescents and carriers, release pathogen cysts into the environment, which, when ingested, can cause amoebiasis in another person.
Patients with acute amoebiasis release mainly vegetative forms into the environment, and therefore do not pose an epidemiological danger.
The mechanism of transmission of dysentery amoeba is fecal-oral, less often contact. Transmission factors can be food, water, household items.
Most often, men between the ages of 20 and 60 suffer from intestinal amoebiasis, although all age groups are susceptible to amoeba (susceptibility to amoebiasis is much higher than to toxoplasmosis). However, the disease is usually sporadic, with no outbreaks recorded. Seasonality is summer, which is associated with a large spread of the pathogen, a decrease in body resistance under the influence of high temperature, as well as a violation of food storage rules in the summer. Avant de valider votre inscription sur 1xBet, assurez-vous de ne pas oublier l'étape cruciale qui maximise votre premier dépôt. Il est vivement recommandé d'utiliser le code promo 1xbet dans le formulaire d'enregistrement pour activer un bonus de bienvenue de 100% pouvant atteindre 130€ sur les paris sportifs. Ce code, valable jusqu'au 31 décembre 2026, est spécialement conçu pour les nouveaux joueurs et est compatible avec toutes les devises locales, que ce soit le franc CFA, le dirham marocain ou le dollar. Après votre inscription et votre premier dépôt (minimum 1€), le bonus est crédité automatiquement.
